Minimum shutter speed on D3s video mode

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xha8

Active member
On the video manual mode I try to change the shutter to something like 1/15, 1/10, 1/8, etc.. It seems that the camera always stick at minimum 1/25 (or maybe 1/50). Is that a normal thing of these "full manual" dSLR video? How about 5DMII/7D?
 
That would be because it's impossible to have the shutter open for longer than the period of the frame rate. If you're shooting 24 fps you probably can't go any slower than 1/25. You should be shooting at 1/48 for 24 fps to give the video 'normal' motion characteristics (motion blur)
 
Thanks for the reply! I just curious to know how the "manual control" looks like in these dSLRs since I can control that kind of shutter speed on my video camera (yeah I know dSLR isn't a video camera).
 
Your A1 uses frame blending to do that. It's not actually exposing 24 frames at 1/3 every second. That would be physically impossible. The D3s, being a still camera, must not have that function built-in.
 
Jester2138 said:
Your A1 uses frame blending to do that. It's not actually exposing 24 frames at 1/3 every second. That would be physically impossible. The D3s, being a still camera, must not have that function built-in.
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Does it drop the frame rate as well or just blend the frames? I had an SD camcorder once which would do a slow shutter effect which would run down to about 3 fps.
 
some camera can handle shutter below 1/24. we called them TIME LAPS:)
but as mentioned, if your frame rate is 24, impossible to set the shutter below this value.
 
i wouldn't call it impossible. it's not unlikely that somebody will design a sensor that doesn't reset but has a continuous readout, thus enabling the start of a new exposure while a previous frame is being exposed. another option is to use a very high framerate internally, 1000 fps or so, and create frames at any desired rate using frame blending. :-)
 
Jester2138 said:
Your A1 uses frame blending to do that. It's not actually exposing 24 frames at 1/3 every second. That would be physically impossible. The D3s, being a still camera, must not have that function built-in.
Click to expand...

Then how come the brightness is double from 30th to 15th and double again to 8th..., it can shoot in the dark with still object.
 
xcm said:
as I told, it is a TIME LAPS, and not 50p video:)
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This is incorrect.

It is still whatever framerate you set it at. For instance, on an XH-A1, if you are shooting 30p with a shutter of 1/10, you are still recording 30 frames per second on the tape. The difference is that many of those frames are identical to the ones preceding them. Time lapse involves an entirely different process.
 
hmmm ... just because your camera processes timelaps, it is still timelaps.
U can do the same movie with a dslr in 4K resolution.
 
If you want to define that as timelapse you may but the main advantage of doing it in video mode was that I could instantly playback on location and see how it looks and then quickly do another adjusted take on the spot. Which meant I could shoot 'A Kindling Light' within three hours on the same night and have it done and edited two days later. This trial and error method would have taken a week to shoot with traditional timelapse photography.
And you said it's impossible to have a shutter speed below frame rate on a video camera, it's not, it's up to the camera manufacturer to enable it or not. Another cool feature of this is that I can also playback the 2 fps I get with this method at 25 fps and it looks just like a film camera undercranked to 2 fps with the same amount of motion blur.
 
how is not taking a picture every second or so timelapse? who cares if every frame is recorded 30 times, just remove the redundant ones and you have the exact same result as if you had been shooting "true" timelapse in the first place. of course in true timelapse you can adjust shutter speed and interval independently but i wouldn't consider that a requirement for something to be called timelapse.
 
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